This is exactly what I've been looking for -- I've been trying to find a way to collaboratively edit a draft PDF of a newsletter, without dumping a lot of money on Acrobat.
Hmm, they're taking a bit of a risk with being flash-based for pdf-export. Hitting your platform vendor for one of their (presumably) cash cows is asking for a response.
It's not like Adobe has some kill switch for Flash apps or can deny them new versions of Flash or anything.
If they were putting something that competed with Apple/AT&T in the App Store, that would be one thing because Apple could find (or invent) some TOS violation and then flip a switch and delete it from all the iPhones everywhere.
But Adobe can't do much to kill a Flash app they don't like. I guess they could add some "if domain = crocodoc.com {crash()}" type line to a Flash update, but it would be hard to do in a way where they wouldn't get caught, and that would be a horrible anti-trust case for them.
Besides, for a very long time, Crocodoc won't be taking appreciable market share. Plus I don't see Crocodoc as much of an Acrobat competitor. Acrobat is for creating and editing PDFs; Crocodoc is for marking them up with edits. I doubt very many people that actually need Acrobat could get away with just using Crocodoc.
crocodoc developer here. This generally depends on the complexity and number of pages in the PDF. If your PDF has a lot of images, graphics, etc or has a lot of pages (more than 60-80) or some combination thereof, Flash becomes...shall we say, unhappy.
Feel free to contact myself or crocodoc support about the issue and we'll take a look at it.
I'm a developer with crocodoc. Yes, all annotations you make in crocodoc will show up in Acrobat Reader, Foxit, etc.
More detail: Sticky Notes and highlight comments are saved as native PDF comments. All other annotation types (highlights, strikeouts, and drawings) are drawn in to the PDF file.
The funny thing is that Adobe could probably make the same thing in about three weeks, but they won't because they hate change.